"Blackmail" is either a noun or a verb, depending on how it is used.
In the sentence, "She demanded that he pay her blackmail," "blackmail" is a noun.
In the sentence, "She was blackmailing her ex-husband," "blackmail is a verb in the past progressive tense.
part of speech
Adjective
What part of speech is thaw
The part of speech for oscillate is verb.
An adjective is a part of speech.
Depending on the context, blackmail is already a verb. For example "to blackmail someone" is an action and therefore a verb.
When it amounts to slander, libel, blackmail, treason, incitement, threats to commit violence etc.
blackmail
blackmail
part of speech
The part of speech for this particular word is a noun.
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath
The part of speech for "explicit" is an adjective.
The part of speech for "twirl" is a verb.
The part of speech for "unfamiliar" is an adjective.